In an oscillator, if ' $\beta^{\prime}$ is the feedback factor and 'A' is the gain of amplifier then…

In an oscillator, if ' $\beta^{\prime}$ is the feedback factor and 'A' is the gain of amplifier then sustained oscillations are obtained when
  1. $\frac{A}{\beta}=1$
  2. A $\beta < 1$
  3. A $\beta=1$.
  4. $A \beta>1$

Solution

For sustained oscillations, the condition known as Barkhausen criterion to be satisfied is $\left|\mathrm{KA}_{\mathrm{v}}\right|=1$

Asked in: MHT CET 2020 (13 Oct Shift 2)

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